Rewrite scoped_ptr<T>(NULL) to use the default ctor in ash/.

ash/wm/gestures/long_press_affordance_handler.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/wm/gestures/long_press_affordance_handler.h"
 
 #include "ash/display/display_controller.h"
 #include "ash/shell.h"
 #include "ash/root_window_controller.h"
 #include "ash/shell_window_ids.h"
@@ skipping 222 matching lines @@
   double current_scale_;
 
   DISALLOW_COPY_AND_ASSIGN(LongPressAffordanceView);
 };
 
 ////////////////////////////////////////////////////////////////////////////////
 // LongPressAffordanceHandler, public
 
 LongPressAffordanceHandler::LongPressAffordanceHandler()
     : ui::LinearAnimation(kAffordanceFrameRateHz, this),
-      view_(NULL),
       tap_down_touch_id_(-1),
       tap_down_display_id_(0),
-      current_animation_type_(NONE) {
-}
+      current_animation_type_(NONE) {}
 
 LongPressAffordanceHandler::~LongPressAffordanceHandler() {}
 
 void LongPressAffordanceHandler::ProcessEvent(aura::Window* target,
                                               ui::LocatedEvent* event,
                                               int touch_id) {
   // Once we have a touch id, we are only interested in event of that touch id.
   if (tap_down_touch_id_ != -1 && tap_down_touch_id_ != touch_id)
     return;
   int64 timer_start_time_ms =
@@ skipping 112 matching lines @@
     default:
       view_.reset();
       tap_down_touch_id_ = -1;
       tap_down_display_id_ = 0;
       break;
   }
 }
 
 }  // namespace internal
 }  // namespace ash